* Copyright (c) 2002, 2003 The NetBSD Foundation, Inc.

/* $NetBSD: dtvar.h,v 1.6 2011/06/04 01:37:36 tsutsui Exp $ */

/*-
* Copyright (c) 2002, 2003 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Andrew Doran.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/

#ifndef _DTVAR_H_
#define _DTVAR_H_

#define DT_DEVICE_NO(a) (((a) - DT_ADDR_FIRST) >> 1)
#define DT_GET_SHORT(b0, b1) (((b0) << 8) | (b1))

struct dt_msg {
uint8_t dst;
uint8_t src;
uint8_t ctl;

/* varzise, checksum byte at end */
uint8_t body[DT_MAX_MSG_SIZE-3];

union {
SLIST_ENTRY(dt_msg) slist;
SIMPLEQ_ENTRY(dt_msg) simpleq;
} chain;
};

#define DT_CTL(l, s, p) \
((l & 0x1f) | ((s & 0x03) << 5) | ((p & 0x01) << 7))
#define DT_CTL_P(c) ((c >> 7) & 0x01)
#define DT_CTL_SUBADDR(c) ((c >> 5) & 0x03)
#define DT_CTL_LEN(c) (c & 0x1f)

struct dt_device {
void *dtdv_arg;
void (*dtdv_handler)(void *, struct dt_msg *);
};

struct dt_state {
volatile u_int *ds_data;
volatile u_int *ds_poll;
int ds_bad_pkts;
int ds_state;
int ds_escaped;
int ds_len;
int ds_ptr;
};

struct dt_softc {
device_t sc_dev;
struct dt_msg sc_msg;
void *sc_sih;
SLIST_HEAD(, dt_msg) sc_free;
SIMPLEQ_HEAD(, dt_msg) sc_queue;
};

struct dt_attach_args {
int dta_addr;
};

#define DT_GET_ERROR -1
#define DT_GET_DONE 0
#define DT_GET_NOTYET 1

void dt_cninit(void);
int dt_identify(int, struct dt_ident *);
int dt_msg_get(struct dt_msg *, int);
void dt_msg_dump(struct dt_msg *);
int dt_establish_handler(struct dt_softc *, struct dt_device *,
void *, void (*)(void *, struct dt_msg *));

extern int dt_kbd_addr;
extern struct dt_device dt_kbd_dv;
extern int dt_ms_addr;
extern struct dt_device dt_ms_dv;
extern struct dt_state dt_state;

#endif /* !_DTVAR_H_ */